[Feature Request] Add HTTP 403 support for OAuth2 token refresh in generic OAuth2Api credential

[b1zya]

I would like to join with the same problem, but with the Avito service. I have already created an Issue on GitHub and received a response that this update is in the plans. However, the Issue was closed without clear indications and implementation time as unplanned. You could support my topic with the same problem.

[GitHub Issue #17450] OAuth2 Client Credentials in n8n does not refresh token after expiry (403 error)

Hi community! I wanted to bring attention to an existing GitHub issue that affects OAuth2 integrations, particularly with APIs like Avito that return 403 instead of 401 when tokens expire. Background: GitHub Issue: OAuth2 Client Credentials in n8n Cloud does not refresh token after expiry (403 error) · Issue #17450 · n8n-io/n8n · GitHub The original issue was created by another user, but I’ve added detailed technical analysis based on my experience with Avito API in…